topic RE: EXOS Stacking and sys-recovery-level in ExtremeSwitching (Other)

EXOS Stacking and sys-recovery-level

M_Nees — Thu, 18 Feb 2016 20:01:00 GMT

Over the last time i have some problems that X450-G2 Stacks and mysterious reboots. Through deeper investigation sometime we have some problems with daemons (for example netlogin / policy daemon). Another reboot was happening as we replace a member stack unit.

Currently i suspect the sys-recovery-level which is set to "reset". Is it possible that if some error happens on a stack member that the master unit of a stack is reseting (because of sys-recovery-level) ??

Does it make sense to change sys-recovery-level from reset to none? Any experience which that on recent EXOS Stacks ?

Mainly i use the EXOS 16.1.x version.

recommendations are welcome.

RE: EXOS Stacking and sys-recovery-level

Prashanth_KG — Thu, 18 Feb 2016 20:28:00 GMT

Hi Mathias,

Sys-recovery-level should not be a concern here. Because, this configuration would be triggered only for the errors related to the failure of hardware/ any slot failure messages.

Are you referring to any process crashes when you refer to the netlogin/policy daemon issues?
It would be interesting to analyze the logs prior to the reboot and understand the cause of the reboots.

RE: EXOS Stacking and sys-recovery-level

M_Nees — Thu, 18 Feb 2016 20:42:00 GMT

Hi Prashanth,

my concern for this post is to understand the purpose and function of sys-recovery-level. What does this command do espacially on a EXOS Stack (for example X450-G2). in manual only the standard chassis / slot system is metioned.

Does it make sense to change the default setting of sys-recovery-level especially on a stack ?

Regards

RE: EXOS Stacking and sys-recovery-level

Prashanth_KG — Thu, 18 Feb 2016 21:04:00 GMT

Hi Mathias,

Check if the below article helps your query.

Sys-recovery-level options and their explanation

It is better to leave this setting to default in a stack as the switch resets the slot upon any HW failure or any critical slot failure messages.
Note: The explanation in the command reference guide is applicable to a summit stack as well!

Hope this helps!

RE: EXOS Stacking and sys-recovery-level

M_Nees — Fri, 19 Feb 2016 13:14:00 GMT

Hi Prashanth,
thanks for the answer - now i am able to estimate what is best for my environment (regarding sys-recovery-level).

Regards